I have a 2007 Dodge Ram 2WD, 3.7 V-6, automatic transmission, 2-door, short box, SXT package with 17,000 miles. It's developed a vibration that starts at 20mph and continues no matter what speed your driving. Most noticeable at 25-28mph and 48-58mph. Although constant, the nature of the vibration seems to cycle and vary in intensity while driving at a constant speed; you can feel EVERY bump in the road, as well. Sometimes it feels like a vibration, sometimes like it's shuddering. You can feel it in the seat of your pants, and by resting your hand on the center fold down seat.

Otherwise, the engine runs smooth, transmission shifts like silk, braking is smooth, and tire alignment is perfect.

Here's what I've done so far - (none of which made a difference)
1. Had all four tires inspected at a professional tire shop (Les Schwab). They are in perfect condition and balance. Also had them rotated.

2. Two techs from Les Schwab's suspension shop drove the truck and confirmed the vibration. They put it up on the rack in the suspension shop and went through everything: shocks, springs, bushings, tie
rods, ball joints, and checked the u-joints and driveshaft. Even pulled off
all 4 tires and re-balanced them. Couldn't find a thing wrong. They
didn't have a way to check the driveshaft for balance, though. (That will be my next step, I guess.) Good news is that they didn't charge me a cent. They had no suggestions, but it's got them really wondering what the cause is, as well.

3. Had the truck in to the dealer where I bought it. Their diagnosis was a "hung up" valve body??? They reconditioned the valve body and flashed the ECM and updated with new software. This didn't solve the vibration problem, but the engine runs smoother.

Any ideas or suggestions as to possible causes/solutions will be appreciated.

 

Did you find a fix as I have the same symptoms????

 

I know this is a fairly old post but the symptoms nail my problem on the head exactly. I'm curious to find out what is causing this. If anyone has any info on this problem I'm all ears!

Thanks
2007 4x4 QC 1500 4.7

 

I have the same problem on my 4.7L 2005. So what is the fix?

 

Same problem with my 07 1500 Hemi 2wd. But you can only feel it between 60 and 70. Tried to balance but couldn't tell any difference. One problem after another it seems like but I still love my truck

 

Same thing with mine lately, seems like I hit a bump the wrong way and it bounces the truck for a while to. Just rotated the tires at 65500, only has 67400 on it now. How long are a set of shocks suppose to last? Any fixes out there for this problem? Anyone, anyone?

 

Has anybody figured this problem out?? I have a 2006 4x4 Hemi. I am getting Vibrations pretty bad around 60mph-70mph too. Also I have a strange whinning noise that gets a bit louder as I increase speed. Any answers will be apprciated!

 

I understand the OP truck has low miles but a jacked U-joint/dinged drivedshaft could be a place to start.

General pricing should be ~100-125 to replace two u-joints and balance the driveshaft. thats with you pulling the shaft and taking it to a driveshaft shop. It IS technically throwing parts at a symptom but you have to start somewhere.

Dont rule out a hammered engine/tranny mount.

 

This seems to be another problem like the "Hemi Tick"

My truck also vibrates at 65-70 mph and like the rest of you I have brought this up to every shop and shad tree mech. and still no answer but my opinion...

Power rack in these trucks are prone to going out and blowing seals all the time and in the past I have had cars/trucks have the same shake at variable speeds and they were cause by a bad rack.

So blame it on the rack and no there is no upgrade for the small racks in these trucks only stock or reman replacements. As long as it is not leaking anything out of the rack dont worry.

 

yea mine kinda does this too....kinda just got used to it.

And JMB, mine was getting a whine for awhile. Then the pumpkin grenaded on me